I'm finding it challenging to get people to opt into my lead magnets without having to use paid ads. I'm working on my SEO daily, using long tail keywords, but I know it will take some time to yield any results. Do you have any advice on how to actually 'get the word out there' to grow my traffic?

Post on social asking your audience some specific things they struggle with that your lead magnet solves. Then DM each person who comments asking if you can send over a free resource to help with their struggles. 

You can also join Facebook groups (or other social media groups) where your Ideal Customer Avatar is hanging out. Spend some time in the groups answering questions and offering value. Once you offer value, you’ll start to identify people who could utilize your lead magnet. DM those people and offer your lead magnet.

You’re building your list one person at a time, and that’s ok. It doesn’t have to come all at once.